Valve grinder



Oct. 16 1923.

C. E. CLARKE VALVE GRINDER Original Filed April 8. 1922 INVENTOR CHARLES E.C (fi d,

LARKE ATTYS.

Patented Oct. 16, 1923. I T

UNITED S AT S PATENT cnaanns E. cLAaxn, or COLUMBUS, 01110, ASSIGNOR or ONE-THTRD ro neurons. s'rrr'r AND ONE-THIRD 'ro THOMAS E. noon, BOTH or com-macs, onro.

VALVE GBINDER.

Application filed April 8, 1922, Serial No. 550,737. Renewed July 16, 1923.

Toall'whomz't'mayconce'm:

Be it known that I, CHARLES E. CLARKE, a citizen of the United States, residing at Columbus in the countyof Franklin and State of hio, have invented a certain new and useful Improvement in Valve Grinders, of which the following is a specification.

The object of this invention is to provide an improved form of device for grinding the valves of engines-especially motor vehicle engines-whereby there is obtained simplicity and durability of construction, facilit in assembling its component parts and e ciency in operation.

The invention is embodied in the example herein shown and described, the features of novelty being finally claimed.

In the accompanying drawing- Figure 1 is a view partly in longitudinal section and broken out to show the interior construction. I

Fig. 2 is a section on the line II- --II Fig 1. ig. 3 is an elevation of the clutch carryin spindle detached from the other parts. Tn the views 5 designates the spindle, the clutch 6 for engagin the valve to be ground being pivoted to the ower end of the spindle by a cotter in. The spindle is cut away at opposite sldes to form a neck 7 and. recesses. Said neck is transversely perforated at 7* to receive a removable journal 8 having its opposite ends provided with removable rollers 9, one in each of the recesses, the ends of said rollers projecting beyond the sides of the spindle.

10 designates an inner sleeve adapted to contain the spindle, said sleeve provided at' its lower end with diametrically arranged parallel spiral slots 11 in which the rollers 9 project and travel. The up er end of the sleeve 10 is closed and provi ed with a reduced externally threaded extension 12.

Said extension 12 is made of such diameter as to leave an ample annular shoulder at the end of the sleeve around the extension. Within the sleeve between, the closed end thereof and the end of the spindle is a removable coil spring 13 of sufiicient resilience to normally press the spindle with the rollers into a position where the rollers are arrested by the lower end of the spiral slots. 7

14 designates an outer sleeve fitting over the inner sleeve and having. at its upper end an inwardly projecting lip or flange 15 adapted to rest on the shoulder around the base of the threaded extension 12. Said outer sleeve 14 is of sufficient length to cover the ends of the rollers 9 when the latter are in their fully depressed osition and Protect the hands of the user fi om in jury in the operation of. the device. The outer sleeve is clamped on the inner sleeve by theinternally threaded shank 16 of a handle 17, said shank turning on the threaded extension 12 and pinching the lip 15 on the shoulder of the inner sleeve around the base of said extension. When secured in place the outer sleeve retains the rollers 9 on their journal.

The device is disassembled by removing the handle 17 and the outer sleeve 14 after which the rollers and their journaling pin are removed thereby permitting the removal of the spindle and the coil spring. semble the parts this process is employed in reverse order.

The clutch which engages the valve to be ground is rotated in one direction by depressing the handle 17 and then releasing the pressure and ermitting the springto rotate the spindle 111 the opposite direction,

With this construction there is very little likelihood of injury to any of the parts and should they become worn they can be easily replaced.

The forms of the parts can be changed without departing from the gist of the invention as claimed.

What I claim is:

1. A valve grinding tool comprising, in combination, a spindle provided with removable bearings projecting transversely therefrom, an inner sleeve rovided with diametrically opposed spiral slots therethrough engaging said bearings to rotate the spindle, a spring between the spindle and the inner sleeve, an outer sleeve covering the inner sleeve and holding said projecting hearings in place and an operating handle for the sleeves.

2. A valve grinding tool comprising, in combination, a spindle provided with removable bearings projecting transversely therefrom, an inner sleeve provided with diametrically opposed spiral slots therethrough engaging said bearings to rotate the spindle, a spring between the spindle and the inner sleeve, anouter sleeve covering the inner sleeve and holding said projecting hearings in place, and an operating handle connected with the inner sleeve and securing said outer sleeve.

CHARLES E. CLARKE. 

